Hygrocontrol manual for type 86 ex page – COSA Xentaur Hygrocontrol Type 86 Ex User Manual

Page 25

Table 3: Display at 100% RH over Ice at different Temperatures

75,5

0,37

0,49

- 30

79,0

0,64

0,81

- 25

81,7

1,03

1,26

- 20

86,9

1,66

1,91

- 15

90,6

2,60

2,87

- 10

95,3

4,02

4,22

- 5

100

6,11

M (%RH)

PSE (mbar)

PSF (mbar)

Temperatur (°C)

PSF = Saturated Vapor Pressure over Chilled Water
PSE = Saturated Vapor Pressure over Ice
M

= Rel. Humidity displayed by HYGROMESS Instruments.

4.7 Measurements under Pressure or Vaccuum

All probes can be used at pressures of 0,9 to 1,3 bar. Only special probes
with a glas feed-through (which predicts SS - 316 tube material) may be
used under pressures of 0,03 to 30 bar. As rel. Humidity is directly
proportional to the pressure (f.E.: increase of pressure by factor 2 also
increases rel. Humidity by factor 2, when temperature and content of water
remain constant!) you shoud take care of a place with constant pressure
values, when mounting the probe. Be aware that pressure may change,
when diameters of tubes change - and air streams may be turbulent at
these places.

HYGROCONTROL Manual for Type 86 Ex Page